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Vulnerabilities

Vulnerability · CVE-2026-55561

InvoicePlane: Guest user IDOR in quote approval and rejection

Published Oct 28, 2026 · catalog updated Nov 3, 2026 · InvoicePlane InvoicePlane

Last checked Nov 6, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-55561. EPSS is 0.27%. Act only if a listed version of InvoicePlane InvoicePlane is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.27%
Remediation
Advisory link
Affected products
vendor InvoicePlane InvoicePlane

InvoicePlane is a self-hosted open source application for managing invoices, clients, and payments. Prior to 1.7.2-beta-1, guest users can approve or reject quotes belonging to any client, not just their assigned clients. The and methods in the Guest Quotes controller, , call and directly without the scoping that sibling methods use. A guest user assigned to one client can change another client's quote status by supplying sequential integer values, and also sends notification emails. Additionally, calls before checking the client scope, allowing a guest user to mark another client's quote as viewed. These issues are fixed in version 1.7.2-beta-1 and the subsequent stable version 1.7.2.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor InvoicePlane InvoicePlaneversion unspecified

How to fix CVE-2026-55561

  • No stored fix

    No vendor fix text is stored. Use the linked advisory before you change production.

  • Version check

    No version range is stored, so an installed version cannot be checked on this page.

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-55561. EPSS is 0.27%. Act only if a listed version of InvoicePlane InvoicePlane is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-639: Authorization Bypass Through User-Controlled Key. EPSS 0.27%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 3, 2026 · Tenable CVE Database

    Detected

    InvoicePlane is a self-hosted open source application for managing invoices, clients, and payments. Prior to 1.7.2-beta-1, guest users can approve or reject quotes belonging to any client, not just their assigned clients. The and methods in the Guest Quotes controller, , call and directly without the scoping that sibling methods use. A guest user assigned to one client can change another client's

  2. Nov 3, 2026 · CVE.org

    Updated

    InvoicePlane is a self-hosted open source application for managing invoices, clients, and payments. Prior to 1.7.2-beta-1, guest users can approve or reject quotes belonging to any client, not just their assigned clients. The and methods in the Guest Quotes controller, , call and directly without the scoping that sibling methods use. A guest user assigned to one client can change another client's

Sources

  • CVE.orgVulnerability recordCVE-2026-55561

    InvoicePlane is a self-hosted open source application for managing invoices, clients, and payments. Prior to 1.7.2-beta-1, guest users can approve or reject quotes belonging to any client, not just their assigned clients. The and methods in the Guest Quotes controller, , call and

    cve.org
  • Tenable CVE DatabaseVulnerability recordCVE-2026-55561

    InvoicePlane is a self-hosted open source application for managing invoices, clients, and payments. Prior to 1.7.2-beta-1, guest users can approve or reject quotes belonging to any client, not just their assigned clients. The and methods in the Guest Quotes controller, , call and directly without the scoping that sibling methods use. A guest user assigned to one client can change another client's

    tenable.com

References

Freshness

Last verified in this catalog Nov 6, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 4, 2026
  • Tenable CVE DatabaseNov 3, 2026